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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 1565217557

Certificate GIA 1565217557

Diamond specifications and retailer prices

From $822 AUD
HK$4,500 HKD
As of November 1, 2026
Save $673 AUD (45%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,495 AUD at With Clarity · As of November 1, 2026
View at With Clarity

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1565217557. Listed at 8 retailers as of November 1, 2026, with prices from $822 to $1,495, a $673 spread on the same certified stone. With Clarity lists it at $1,495. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1565217557
Dimensions7.94 × 4.09 × 2.63 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.94 mm4.09 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1565217557
Side View
Table 58.0%CrownGirdle: ThickPavilionCulet: NoneDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,470 AUD|Low: $804 AUD|High: $1,545 AUD|Avg: $1,167 AUD|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
With Clarity
November 2, 2026
Retailer 2$822 AUD
Retailer 3$957 AUD
Retailer 4$1,022 AUD
Retailer 5$1,073 AUD
Retailer 7$1,094 AUD
Retailer 6$1,139 AUD
Retailer 1$1,470 AUD
With Clarity$1,495 AUD

26 data points across 8 retailers

8 retailers$822 AUD to $1,495 AUD

A
Cheapest Retailer
-
$822 AUD
HK$4,500 HKD
B+
Retailer 2
-
$957 AUD
$671 USD
View
B+
Retailer 3
-
$1,022 AUD
$716 USD
View
Final sale: no returns
B+
Retailer 4
-
$1,073 AUD
SGD 1,016 SGD
View
B
Retailer 5
-
$1,094 AUD
$767 USD
View
Retailer 6
-
$1,139 AUD
SGD 1,079 SGD
View
Price last confirmed 7 days ago
B
Retailer 7
-
$1,470 AUD
€981 EUR
View
Most Expensive
B
With Clarity
1565217557 · Nov 1
$1,495 AUD
$1,048 USD
View
7 more retailers have this diamond
Prices start from $822 AUDSave up to $673 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Marquise
$822 AUD